John Deere announces final Tier 4/Stage IV engine technology path

John Deere announces continuation of its planned building-block approach to meet United States Final Tier 4 and European Union Stage IV emissions regulations. Final Tier 4/Stage IV regulations for off-highway diesel engines begin as early as 2013 for engines 55 kW (74 hp) and below. Regulatory dates for engines 56 kW (75 hp) and above will be implemented in stages starting in 2014 and 2015, and require particulate matter (PM) levels established by Interim Tier 4/Stage III B regulations to be maintained while requiring an additional 80 percent reduction in nitrogen oxides (NOx) from previous regulations. To meet Final Tier 4/Stage IV emissions regulations in some power categories, John Deere developed the Integrated Emissions Control system -- an optimized aftertreatment solution paired with the performance-enhanced, fuel-efficient Interim Tier 4/Stage III B engine platform, featuring proven cooled exhaust gas recirculation (EGR).